I’m living in japan. Why Mandate setup failed? Japan post bank. The Direct Debit Mandate setup failed JAPAN POST BANK Checking •.<removed> Your bank could not proceed to set up the Direct Debit Mandate. Make sure that your bank details, Kana name, and date of birth match your bank information. Please note the Direct Debit Mandate isn't available for corporate bank accounts. Go to your Wallet and try again.